P. grandis

P. grandis may refer to:
 * Pachycereus grandis, a large cactus species in the genus Pachycereus native to Mexico and just into southern Arizona, United States
 * Peromyscus grandis, the big deer mouse, a rodent species found only in Guatemala
 * Phasia grandis, a fly species in the genus Phasia
 * Pinanga grandis, a flowering plant species in the genus Pinanga
 * Pisonia grandis, a flowering tree species distributed throughout the coral cays of the Indian and Pacific Oceans
 * Pleurobranchus grandis, a marine sidegill slug species
 * Ploceus grandis, the giant weaver, a bird species endemic to São Tomé and Príncipe
 * Promynoglenes grandis, a spider species in the genus Promynoglenes endemic to New Zealand

Synonyms

 * Paphinia grandis, a synonym for Paphinia grandiflora, an orchid species native to Brazil
 * Pritchardia grandis, a synonym for Licuala grandis, a palm species